ECC-Messaging-Scheme-Package

A system that encrypts and decrypts data packets with the elliptic curve cryptography (ECC) for others to utilize and download.

Where to download:

typescript/javascript

https://www.npmjs.com/package/ecc-messaging-scheme-package

Python

https://pypi.org/project/ecc-messaging-scheme-package/

Classes

We have one main class, ECCM class, which combines our ECC class and our Encrypt/Decrypt, and curve initialization(initializePublicEnv) functions.

The ECC Class:

• Responsible for generating/loading private key
• Get current users public key from cookies or create a new one and save
• Gets shared key using diffie hellman when given another users public key
• Clear cookies containing private key for current instance.

Encrypt/Decrypt:

• Given a key and text it encrypts/decrypts text using AES

initializePublicEnv function:

• Inizalites a point and an ecc curve: secp256k1

ECCM class:

• Main interface for users
• Users can initialize curve
• Get shared keys
• Run encryption/decryption using ECCDH

Examples:

How to instaciate a ECC object. This creates a randomly generate private key for each user and is store in their cookies. The main param is a uuid string.

let ecc1 = new ECCM("1");
let ecc2 = new ECCM("2");

This is how you get a users public key and access the x coordinate.

ecc1.ECC.getPublicKey();
console.log(ecc1.ECC.getPublicKey()['x'])

This is how you create a point, when you already have a previsouly generated external keys

let randomKey = new ecc_math.ModPoint(
  58245954963044076335222193032419637688317373475605757277584156718458924469103n,
  12764036181290433088658499435961200322530176588733628912045896254235383420282n
);

Given another key this is how you generate a shared key

ecc2.generateSharedKey(randomKey);
console.log(ecc2.ECC.getSharedKey())

Finally once the shared key is set you can encrypt and decrypt as follows:

const cipher = ecc2.encrypt("It's working")
console.log(cipher);
console.log(ecc2.decrypt(cipher));

Disclaimer

Use at Your Own Risk.